重定向PHP
这个问题在这里已经有了答案：
尝试使用header()函数，如下所示：
if ($num == 1)
{
header("Location: http://www.example.com");
}
很明显，将http://www.example.com更改为您选择的位置，并将其放在页面中的任何HTML上方，否则您将得到一个标题已设置的错误。
考虑到上述情况，您需要重新安排您的代码，如下所示：
<?php
// takes the variables from action script and assigns them php variables names
$user = $_POST ['username'];
$pass = $_POST ['password'];
$error = '';
// if there is a user name and password
if ($user && $pass)
{
// connect to server
mysql_connect("localhost", "", "") or die(mysql_error());
//select database
mysql_select_db("") or die(mysql_error());
//Create a query that selects all data from the PATIENT table where the username and password match
$query = "SELECT * FROM Patient WHERE Username = '$user' AND Password = '$pass'";
//executes query on the database
$result = mysql_query ($query) or die ("didn't query");
//this selects the results as rows
$num = mysql_num_rows ($result);
//if there is only 1 result returned than the data is ok
if ($num == 1)
{
//sends back a data of "Success"
header("Location: success.php");
}
else
{
//sends back a message of "failed"
$error = "Unsuccessful Login";
}
}
?>
<html>
<head>
</head>
<body>
<!-- Home -->
<div data-role="page" id="page1">
<div data-theme="a" data-role="header">
<a data-role="button" data-theme="d" href="login.html" data-icon="arrow-l" data-iconpos="left" class="ui-btn-left">
Back
</a>
<a data-role="button" href="index.html" data-icon="home" data-iconpos="right" data-theme="d"class="ui-btn-right">
Home
</a>
<h3>
Login Process
</h3>
</div>
<div data-role="content">
<?php echo $error; ?>
</div>
</div>
</body>
</html>`
此外，我会敦促您在继续使用这种类型的事情之前查看PDO或mysqli，并准备好带有限定值的语句，因为您正在打开自己的SQL注入攻击 。
您只需更改标题并退出脚本：
header("Location: http://www.example.com");
die();
只需使用
header("Location: http://www.test.com");
请注意，如果之前没有输出，您只能设置标题重定向。 没有单词，没有html语法，甚至没有简单的空白。
更多细节：标题功能
因此，您必须将PHP部分放在脚本的顶部，并将成功/错误消息存储在变量中而不是直接的“回显”中。
例子：请注意你的if子句中的变量“$ return_message”。 没有“回声”了，但在HTML上下文中，您会找到输出的回显。
<?php
// takes the variables from action script and assigns them php variables names
$user = $_POST ['username'];
$pass = $_POST ['password'];
// if there is a user name and password
if ($user && $pass)
{
// connect to server
mysql_connect("localhost", "", "") or die(mysql_error());
//select database
mysql_select_db("") or die(mysql_error());
//Create a query that selects all data from the PATIENT table where the username and password match
$query = "SELECT * FROM Patient WHERE Username = '$user' AND Password = '$pass'";
//executes query on the database
$result = mysql_query ($query) or die ("didn't query");
//this selects the results as rows
$num = mysql_num_rows ($result);
//if there is only 1 result returned than the data is ok
if ($num == 1)
{
//sends back a data of "Success"
$return_message = "Successful Login";
$row=mysql_fetch_array($result);
$_SESSION['Name'] = $row['Name'];
$_SESSION['Address'] = $row['Address'];
}
else
{
//sends back a message of "failed"
$return_message = echo "Unsuccessful Login";
}
}
?></head>
<body>
<!-- Home -->
<div data-role="page" id="page1">
<div data-theme="a" data-role="header">
<a data-role="button" data-theme="d" href="login.html" data-icon="arrow-l" data-iconpos="left" class="ui-btn-left">
Back
</a>
<a data-role="button" href="index.html" data-icon="home" data-iconpos="right" data-theme="d"class="ui-btn-right">
Home
</a>
<h3>
Login Process
</h3>
</div>
<div data-role="content">
<?php echo $return_message; ?>
</div>
</div>
</body>
</html>
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